3
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Components
Service manual
50
250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
3 Components
3.1 4-way valve
3.1.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a mechanical check of the 4-way valve
Prerequisite:
Stop the unit operation via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
111].
1
Verify that the screw is firmly fixing the coil to the valve body.
2
Check if any damage or burst is present.
Is the 4‑way valve coil firmly fixed and
not visually damaged?
Action
Yes
Perform an electrical check of the 4‑way
valve, see
50].
No
Fix or replace the 4‑way valve coil, see
To perform an electrical check of the 4-way valve
Prerequisite:
First perform a mechanical check of the 4-way valve, see
1
Unplug the 4-way valve connector from the appropriate PCB.
2
Measure the resistance of the 4-way valve coil between the pins of the 4-way
valve connector.
Result:
The measured value must be 1.2 kΩ ± 10%.
Is the measured value correct?
Action
Yes
Continue with the next step.
No
Replace the 4‑way valve coil, see
When outdoor temperature is mild and unit can switch between heating and
cooling
INFORMATION
This procedure is ONLY possible when the outdoor temperature is within the
temperature range for both
Heating
and
Cooling
operation mode. See the
databook on Business Portal for the temperature range of the operation modes.
3
Connect the 4‑way valve connector to the appropriate PCB.
4
Turn ON the power using the respective circuit breaker.
5
Activate
Heating
operation via the user interface.
Summary of Contents for Sky Air Advance RZA200D7Y1B
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